Time Unit Converter

Convert seconds, minutes, hours, days, weeks and years.

Time Unit Converter

Universal unit converter engine

Conversion Category

From Value

Converted Result

Conversion Formula1 nm = 0.001 µm

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What does Time Unit Converter do?

Convert between time units from nanoseconds to centuries, with average month and year lengths clearly stated so long-span conversions are honest about their assumptions.

How to Use Time Unit Converter

1
Enter a durationAny value.
2
Select the unitFrom and to.
3
Read the resultsPlus the composite breakdown.

Key Features

13 units from nanoseconds to centuries
Average month (30.44 days) and year (365.2425 days) stated explicitly
Decimal hours output for payroll
Composite breakdown: any duration as days, hours, minutes and seconds
Every unit shown at once

Frequently Asked Questions

How many seconds are in a day?

86,400 — 24 × 60 × 60. This ignores leap seconds, which are occasionally inserted to keep clocks aligned with the Earth’s rotation and which almost no software accounts for.

How long is a month here?

30.436875 days on average — the Gregorian year divided by twelve. Real months range from 28 to 31 days, so use the date difference calculator when you need calendar-accurate answers.

Why is a year 365.2425 days?

That is the average Gregorian year, accounting for the leap year rules: every four years, except centuries, except every 400 years. The tropical year is about 365.2422 days, so the Gregorian calendar drifts by a day roughly every 3,200 years.

How do I convert minutes to decimal hours?

Divide by 60. 45 minutes is 0.75 hours. Payroll and billing systems almost always want decimal hours, which is why it is shown separately.

100% Data Privacy

Conversions run in your browser using fixed, published factors. Nothing you enter is transmitted, and the tool keeps working with the network disconnected.